Extended X-Ray Absorption Fine Structure Measurements of Laser-Shocked V and Ti and Crystal Phase Transformation in Ti

Journal Article · Thu Mar 04 23:00:00 EST 2004 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.92.095504· OSTI ID:821888

Yaakobi, B ^[1]; Meyerhofer, D D; Boehly, T R; Rehr, J J; Remington, B A; Allen, P G; Pollaine, S M; Albers, R C

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1. Laboratory for Laser Energetics, University of Rochester, Rochester, NY

OAK-(B204)Extended X-Ray Absorption Fine Structure (EXAFS), using a laser-imploded target as a source, can yield the properties of laser-shocked metals on a nanosecond time scale. EXAFS measurements of vanadium shocked to {approx}0.4 Mbar yield the compression and temperature in good agreement with hydrodynamic simulations and shock-speed measurements. In laser-shocked titanium at the same pressure, the EXAFS modulation damping is much higher than warranted by the predicted increase in temperature. This is shown to be due to the a-Ti to w-Ti crystal-phase transformation, known to occur below {approx}0.1 Mbar for slower shock waves.

• Research Organization: Laboratory for Laser Energetics (US)
• Sponsoring Organization: (US)
• DOE Contract Number: FC03-92SF19460
• OSTI ID: 821888
• Report Number(s): DOE/SF-19460-519; 1429; 2003-193
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 92
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
COMPRESSION
CRYSTAL-PHASE TRANSFORMATIONS
DAMPING
FINE STRUCTURE
HYDRODYNAMICS
MODULATION
PHASE TRANSFORMATIONS
SHOCK WAVES
TARGETS
TITANIUM
VANADIUM